Uplink signal transmission method, processing device, and system

ABSTRACT

An uplink signal scheduling method, a processing device, and a system. The method includes when uplink signals sent by at least one transmit device are received, preprocessing the uplink signals, to generate a data over cable service interface specification (DOCSIS) frame, where the DOCSIS frame includes at least two uplink signals, and each uplink signal of the at least two uplink signals corresponds to one uplink wavelength, and when it is detected that a signal conflict exists in the DOCSIS frame, creating at least two signal groups according to the uplink signals, and allocating, to the at least two signal groups, uplink signals that have a same uplink wavelength and cause the signal conflict, and performing scheduling on the uplink signals according to the signal groups that have undergone allocation.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2013/082721, filed on Aug. 30, 2013, which is hereby incorporatedby reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of communicationstechnologies, and in particular, to an uplink signal transmissionmethod, a processing device, and a system.

BACKGROUND

With continuous development and improvement of communicationstechnologies, operators use optical node splitting in a hybridfiber-coax (HFC) network, to improve a household average access rate ofusers. Using the data over cable service interface specification(DOCSIS), the HFC network supports a computer network and a cabletelevision network, and implements transmission of an Internet Protocol(IP) data packet between a transmit device and a cable modem (CM) of theHFC network.

Existing radio frequency over glass (RFoG) technologies can implementthat a DOCSIS network is extended from a peripheral unit to a CM of abuilding user unit using an optical distribution network (ODN). An RFoGnetwork can share an ODN with a passive optical network (PON), anduplink and downlink bandwidths (where the uplink bandwidth is 1610nanometer (nm), and the downlink bandwidth is 1550 nm) provided by theRFoG network are compatible with uplink and downlink bandwidth (wherethe uplink bandwidth is 1310 nm, and the downlink bandwidth is 1490 nm)of the PON. A downlink channel of the RFoG network and that of an HFCnetwork are identical and both use a broadcasting transmission service,but a difference lies in burst mode time division multiplexing (TDM)used by an optical network unit (ONU) of the RFoG network duringtransmission of an uplink signal, that is, an radio frequency over glassoptical network unit (R-ONU) transmitting circuit automaticallycontrols, by automatically detecting a level of a radio frequencysignal, a laser on an uplink channel to be enabled and disabled, andtransmits, in an optical fiber, a radio frequency signal by means ofamplitude modulation and/or frequency modulation. It must be ensuredthat a cable modem termination system (CMTS) can perform uplinkcommunication with one or more CMs that are located after only oneR-ONU. If two or more R-ONUs that have a same wavelength or similarwavelengths simultaneously perform uplink transmission in an opticalfiber, optical beat interference occurs, causing a decrease in asignal-to-noise ratio of an uplink signal, packet loss and the like,which seriously affect uplink communication.

For DOCSIS 3.1, both orthogonal frequency division multiple access(OFDMA) and single channel quadrature amplitude modulation (SC-QAM)technologies are used in the uplink. A difference between the OFDMAtechnology and the SC-QAM technology lies in uplink TDM in the uplink ofthe SC-QAM, multiple CMs simultaneously send an uplink signal in oneOFDMA frame, and if in one OFDMA frame, multiple CMs are located aftermultiple R-ONUs that have a same wavelength or similar wavelengths, aconflict inevitably exists in the uplink of an RFoG system.

SUMMARY

Embodiments of the present disclosure provide an uplink signaltransmission method, a processing device, and a system, which can avoida conflict that occurs when OFDMA and SC-QAM uplink signals in a coaxialdistribution network are transmitted using an optical fiber radiofrequency system.

To resolve the foregoing technical problem, a first aspect of thepresent disclosure provides an uplink signal scheduling method, whichmay include, when uplink signals sent by at least one transmit deviceare received, preprocessing the uplink signals, to generate a DOCSISframe, where the DOCSIS frame includes at least two uplink signals, andeach uplink signal of the at least two uplink signals corresponds to oneuplink wavelength, when it is detected that a signal conflict exists inthe DOCSIS frame, creating at least two signal groups according to theuplink signals, and allocating, to the at least two signal groups,uplink signals that have a same uplink wavelength and cause the signalconflict, and performing scheduling on the uplink signals according tothe signal groups that have undergone allocation.

According to the first aspect, in a first feasible implementation mannerof the first aspect, before the receiving uplink signals sent by atleast one transmit device, the method further includes configuring anuplink wavelength for each transmit device of the at least one transmitdevice to send an uplink signal such that each transmit device of the atleast one transmit device sends an uplink signal using the configureduplink wavelength.

According to the first aspect or the first feasible implementationmanner of the first aspect, in a second feasible implementation mannerof the first aspect, the preprocessing the uplink signals, to generate aDOCSIS frame includes separating the uplink signals according to atleast one type of uplink wavelength, converting each separated uplinksignal into a radio frequency signal, and combining all converted radiofrequency signals into an electrical domain signal, and demodulating theelectrical domain signal to obtain the DOCSIS frame.

According to the first aspect or the first feasible implementationmanner of the first aspect or the second feasible implementation mannerof the first aspect, in a third feasible implementation manner of thefirst aspect, the detecting that a signal conflict exists in the DOCSISframe includes, when it is detected that exception information occurs onan uplink channel used for transmitting the uplink signals, determiningthat a signal conflict exists in the DOCSIS frame, where the exceptioninformation includes modulation error ratio degradation, or an increasein a packet loss rate or the like.

According to the first aspect or the first feasible implementationmanner of the first aspect or the second feasible implementation mannerof the first aspect or the third feasible implementation manner of thefirst aspect, in a fourth feasible implementation manner of the firstaspect, the allocating, to the signal groups, uplink signals that have asame uplink wavelength and cause the signal conflict includes acquiring,according to the signal conflict, the uplink signals that have a sameuplink wavelength, and allocating the uplink signals that have a sameuplink wavelength to different signal groups, and acquiring the signalgroups that have undergone allocation.

According to the first aspect or the first feasible implementationmanner of the first aspect or the second feasible implementation mannerof the first aspect or the third feasible implementation manner of thefirst aspect or the fourth feasible implementation manner of the firstaspect, in a fifth feasible implementation manner of the first aspect,the performing scheduling on the uplink signals according to the signalgroups that have undergone allocation includes scheduling an uplinkbandwidth resource according to the signal groups that have undergoneallocation, and allocating the scheduled uplink bandwidth resource toCMs corresponding to the uplink signals.

A second aspect of the present disclosure provides a processing device,which may include a processing module configured to, when uplink signalssent by at least one transmit device are received, preprocess the uplinksignals, to generate a DOCSIS frame, where the DOCSIS frame includes atleast two uplink signals, and each uplink signal of the at least twouplink signals corresponds to one uplink wavelength, a grouping moduleconfigured to, when it is detected that a signal conflict exists in theDOCSIS frame, create at least two signal groups according to the uplinksignals, and allocate, to the at least two signal groups, uplink signalsthat have a same uplink wavelength and cause the signal conflict, and ascheduling module configured to perform scheduling on the uplink signalsaccording to the signal groups that have undergone allocation.

According to the second aspect, in a first feasible implementationmanner of the second aspect, the method further includes a configurationmodule configured to configure an uplink wavelength for each transmitdevice of the at least one transmit device to send an uplink signal suchthat each transmit device of the at least one transmit device sends anuplink signal using the configured uplink wavelength.

According to the second aspect or the first feasible implementationmanner of the second aspect, in a second feasible implementation mannerof the second aspect, the processing module includes a separation unitconfigured to, when the uplink signals sent by the at least one transmitdevice are received, separate the uplink signals according to at leastone type of uplink wavelength, a combination unit configured to converteach separated uplink signal into a radio frequency signal, and combineall converted radio frequency signals into an electrical domain signal,and a demodulation unit configured to demodulate the electrical domainsignal to obtain the DOCSIS frame.

According to the second aspect or the first feasible implementationmanner of the second aspect or the second feasible implementation mannerof the second aspect, in a third feasible implementation manner of thesecond aspect, the grouping module includes, a determining unitconfigured to, when it is detected that exception information occurs onan uplink channel used for transmitting the uplink signals, determinethat a signal conflict exists in the DOCSIS frame, where the exceptioninformation includes modulation error ratio degradation, or an increasein a packet loss rate or the like, a grouping unit configured to createat least two signal groups according to the uplink signals, a signalacquiring unit configured to acquire, according to the signal conflict,the uplink signals that have a same uplink wavelength, and an allocationand acquiring unit configured to allocate the uplink signals that have asame uplink wavelength to different signal groups, and acquire thesignal groups that have undergone allocation.

According to the second aspect or the first feasible implementationmanner of the second aspect or the second feasible implementation mannerof the second aspect or the third feasible implementation manner of thesecond aspect, in a fourth feasible implementation manner of the secondaspect, the scheduling module is further configured to schedule anuplink bandwidth resource according to the signal groups that haveundergone allocation, and allocate the scheduled uplink bandwidthresource to CMs corresponding to the uplink signals.

A third aspect of the present disclosure provides a processing device,which may include a receiver and a processor, where the processorperforms the following steps: when controlling the receiver to receiveuplink signals sent by at least one transmit device, preprocessing theuplink signals, to generate a DOCSIS frame, where the DOCSIS frameincludes at least two uplink signals, and each uplink signal of the atleast two uplink signals corresponds to one uplink wavelength; whendetecting that a signal conflict exists in the DOCSIS frame, creating atleast two signal groups according to the uplink signals, and allocating,to the at least two signal groups, uplink signals that have a sameuplink wavelength and cause the signal conflict, and performingscheduling on the uplink signals according to the signal groups thathave undergone allocation.

A fourth aspect of the present disclosure provides an uplink signalscheduling system, which may include at least one transmit device andthe processing device according to the second aspect, or may include atleast one transmit device and the processing device according to thethird aspect, where the transmit device is configured to send uplinksignals to the processing device such that the processing devicepreprocesses the uplink signals, to generate a DOCSIS frame such thatwhen detecting that a signal conflict exists in the DOCSIS frame, theprocessing device creates at least two signal groups according to theuplink signals, and allocates, to the at least two signal groups, uplinksignals that have a same uplink wavelength and cause the signalconflict, and the processing device performs scheduling on the uplinksignals according to the signal groups that have undergone allocation,where the transmit device is an R-ONU that uses a wavelength tunablelaser or an R-ONU that uses a colored laser.

As can be learned from the above, uplink signals sent by at least onetransmit device are received, and scheduling is performed on the uplinksignals according to signal groups such that multiple uplink signals areallowed to be received simultaneously at any time, and a transmit deviceuses a wavelength tunable laser or uses a colored laser, which increasestunability of an uplink wavelength of an uplink signal sent by thetransmit device, and avoids a conflict between uplink signals to thegreatest extent, thereby better ensuring normal communication on anuplink channel.

BRIEF DESCRIPTION OF DRAWINGS

To describe the technical solutions in the embodiments of the presentdisclosure or in the prior art more clearly, the following brieflyintroduces the accompanying drawings required for describing theembodiments. The accompanying drawings in the following description showmerely some embodiments of the present disclosure, and a person ofordinary skill in the art may still derive other drawings from theseaccompanying drawings without creative efforts.

FIG. 1 is a schematic flowchart of an uplink signal scheduling methodaccording to an embodiment of the present disclosure;

FIG. 2 is a schematic flowchart of another uplink signal schedulingmethod according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a processing deviceaccording to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of another processing deviceaccording to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a processing moduleaccording to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a grouping module accordingto an embodiment of the present disclosure; and

FIG. 7 is a schematic structural diagram of still another processingdevice according to an embodiment of the present disclosure.

DESCRIPTION OF EMBODIMENTS

The following clearly describes the technical solutions in theembodiments of the present disclosure with reference to the accompanyingdrawings in the embodiments of the present disclosure. The describedembodiments are merely some but not all of the embodiments of thepresent disclosure. All other embodiments obtained by a person ofordinary skill in the art based on the embodiments of the presentdisclosure without creative efforts shall fall within the protectionscope of the present disclosure.

In the embodiments of the present disclosure, a DOCSIS system mayinclude a CMTS, an HFC network, a CM, and the like. The CMTS may bedeployed at a front end of a cable television network, or may bedeployed in an optical station in a bidirectional HFC network, andfunctions as a gateway between a data network and the HFC network. TheCM is deployed between the HFC network and user equipment. In the uplinkof the DOCSIS system, advanced time division multiple access (A-TDMA)and synchronous code division multiple access (S-CDMA) are supported,and OFDMA and SC-QAM can be used to improve spectral efficiency.Therefore, DOCSIS systems are widely used. Currently, a manner of timedivision multiple access (TDMA) is generally used in the uplink, and TDMis implemented by dividing, on different channels, different mini-slotsfor different user equipment.

When a processing device receives uplink signals sent by at least onetransmit device, the processing device monitors the uplink signals, andif detecting that a signal conflict exists between the uplink signals,the processing device performs signal grouping on the uplink signals,and performs scheduling on the uplink signals according to the signalgroups.

It should be noted that the processing device may be a CMTS, the uplinksignal is transmitted by a CM to a transmit device corresponding to theCM, and transmitted by the transmit device to the processing deviceusing an optical node. An uplink signal uploaded by the CM is processedby the processing device, and uplink communication between the CM andthe processing device is completed. The transmit device may be an R-ONUthat uses a wavelength tunable laser or an R-ONU that uses a coloredlaser.

With reference to FIG. 1 and FIG. 2, the following describes in detailan uplink signal scheduling method provided in the embodiments of thepresent disclosure.

Refer to FIG. 1, which is a schematic flowchart of an uplink signalscheduling method according to an embodiment of the present disclosure.As shown in FIG. 1, the method of this embodiment of the presentdisclosure includes step S101 to step S103 in the following.

Step S101: When uplink signals sent by at least one transmit device arereceived, preprocess the uplink signals, to generate a DOCSIS frame,where the DOCSIS frame includes at least two uplink signals, and eachuplink signal of the at least two uplink signals corresponds to oneuplink wavelength.

When a processing device receives uplink signals sent by at least onetransmit device, the processing device may preprocess the uplinksignals. A procedure for the preprocessing may include, separating theuplink signals according to at least one type of uplink wavelength,converting each separated uplink signal into a radio frequency signal,and combining all converted radio frequency signals into an electricaldomain signal, performing processing, such as amplification, filtering,or analog-to-digital conversion on the electrical domain signal, anddemodulating the processed electrical domain signal separately accordingto SC-QAM and OFDMA, to generate a DOCSIS frame, where the DOCSIS frameincludes at least two uplink signals, each uplink signal of the at leasttwo uplink signals corresponds to one uplink wavelength. It should benoted that uplink wavelengths corresponding to the uplink signals may bea same uplink wavelength, or may be different uplink wavelengths. For aspecific uplink wavelength, an uplink wavelength of an uplink signalsent by the transmit device may be preconfigured by the processingdevice.

After generating the DOCSIS frame, the processing device may monitor anuplink channel used for transmitting the uplink signals, and if theprocessing device detects that exception information occurs on theuplink channel, the processing device determines that a signal conflictexists between the uplink signals.

The exception information includes modulation error ratio degradation,an increase in a packet loss rate or the like, or signal-to-noise ratiodegradation of an uplink channel, or the like, and the signal conflictis a case in which uplink wavelengths of uplink signals sent by atransmit device of the at least one transmit device are the same.

It should be noted that the transmit device may be an R-ONU that uses awavelength tunable laser or an R-ONU that uses a colored laser. Thetransmit device may work in a burst mode, or may work in a continuousmode. A burst mode indicates that multiple R-ONUs may share one uplinkwavelength, and a continuous mode indicates that one R-ONU can occupyonly one specific uplink wavelength. In the burst mode, although alength of a cyclic prefix (CP) of an OFDM uplink signal and a length ofa preamble of an SC-QAM uplink signal are limited, compared with thecontinuous mode, using the burst mode can effectively reduce asignal-to-noise ratio of an uplink channel.

The wavelength tunable laser may include a distributed feedback (DFB)laser or a distributed Bragg reflector (DBR) laser. The colored lasermay include a coarse wavelength division multiplexer (CWDM) laser, or adense wavelength division multiplexer (DWDM) laser. Costs of using aCWDM laser are lower than costs of using a DWDM laser, a DFB laser, or aDBR laser, where the DFB laser and the DBR laser are both wavelengthtunable lasers. A wavelength tunable range (where each degree Celsiuscorresponds to a wavelength shift of 0.1 nm) of 3 nm to 4 nm can beachieved by controlling an operating temperature of the DFB laser. TheDBR laser has a wavelength tunable range of about 10 nm.

Step S102: When it is detected that a signal conflict exists in theDOCSIS frame, create at least two signal groups according to the uplinksignals, and allocate, to the at least two signal groups, uplink signalsthat have a same uplink wavelength and cause the signal conflict.

When the processing device detects that a signal conflict exists in theDOCSIS frame, the creating, by the processing device, signal groupsaccording to the uplink signals further includes searching for CMidentifiers of the at least one transmit device that sends the uplinksignals, and creating the at least two signal groups according to thefound CM identifiers, allocating, by the processing device to differentsignal groups, CM identifiers indicated by uplink signals that have asame uplink wavelength and cause the signal conflict, and acquiring thesignal groups that have undergone allocation.

It should be noted that the signal group is preferably a groupingmatrix, the processing device records CM identifiers of all transmitdevices, and the signal groups may be set according to the CMidentifiers.

Optionally, when the processing device detects that a signal conflictexists in the DOCSIS frame, the processing device may adjust the uplinkwavelengths of the uplink signals sent by the at least one transmitdevice, which can ensure that when the signal conflict occurs, theuplink wavelengths of the uplink signals sent by the at least onetransmit device are properly allocated.

Step S103: Perform scheduling processing on the uplink signals accordingto the signal groups that have undergone allocation.

The processing device schedules an uplink bandwidth resource accordingto the signal groups that have undergone allocation, and allocates thescheduled uplink bandwidth resource to CMs that correspond to the uplinksignals. The uplink bandwidth resource may include a time domainresource, a frequency domain resource, or the like.

Further, after performing scheduling on the uplink signals, theprocessing device processes the uplink signals according to the signalgroups in order to complete communication with the CMs in an uplinkchannel.

In this embodiment of the present disclosure, uplink signals sent by atleast one transmit device are received, and scheduling is performed onthe uplink signals according to signal groups such that multiple uplinksignals are allowed to be received simultaneously at any time, and atransmit device uses a wavelength tunable laser or uses a colored laser,which increases tunability of an uplink wavelength of an uplink signalsent by the transmit device, and avoids a conflict between uplinksignals to the greatest extent, thereby better ensuring normalcommunication on an uplink channel.

Refer to FIG. 2, which is a schematic flowchart of another uplink signalscheduling method according to an embodiment of the present disclosure.As shown in FIG. 2, the method of this embodiment of the presentdisclosure includes step S201 to step S210 in the following.

Step S201: Configure an uplink wavelength for each transmit device of atleast one transmit device to send an uplink signal such that eachtransmit device of the at least one transmit device sends an uplinksignal using the configured uplink wavelength.

The processing device configures the uplink wavelength for each transmitdevice of the at least one transmit device to send an uplink signal.Preferably, the processing device may send configuration information toat least one transmit device, where the configuration information maycarry information about the uplink wavelength for each transmit deviceof the at least one transmit device to send an uplink signal.

For example, for a transmit device that includes a wavelength tunablelaser, when the transmit device is powered on, the transmit device workson a preset wavelength, and a parsing module needs to be built in thetransmit device and is configured to parse configuration informationdelivered by the processing device. The processing device may deliverconfiguration information using a downlink channel according to anuplink conflict monitoring status. For example, if a DOCSIS includesonly four transmit devices, the processing device may tune an uplinkwavelength of the transmit device to a specific value using theconfiguration information, which can ensure that no conflicting uplinksignals exist on an uplink channel of the system. If a DOCSIS systemincludes more than four transmit devices, the processing device needs totune an uplink wavelength using a preset algorithm and according to anuplink channel status, and configure the uplink wavelength of thetransmit device using the configuration information, thereby ensuringthat no conflicting uplink signals exist on an uplink channel of thesystem.

Step S202: When the uplink signals sent by the at least one transmitdevice are received, separate the uplink signals according to at leastone type of uplink wavelength.

When the processing device receives at least one uplink signal sent by atransmit device, the processing device separates the uplink signalaccording to at least one type of uplink wavelength, to form multipleuplink signals.

Step S203: Convert each separated uplink signal into a radio frequencysignal, and combine all converted radio frequency signals into anelectrical domain signal.

The processing device converts each separated uplink signal into a radiofrequency signal, and combines all converted radio frequency signalsinto one electrical domain signal.

Step S204: Demodulate the electrical domain signal to obtain a DOCSISframe.

The processing device performs processing, such as amplification,filtering, or analog-to-digital conversion on the electrical domainsignal, and demodulates the processed electrical domain signalseparately according to SC-QAM and OFDMA, to generate the DOCSIS frame.

It should be noted that a procedure for demodulation according to OFDMAincludes performing processing, such as fast Fourier transform (FFT),de-interleaving, or error correction encoding and decoding on theelectrical domain signal.

Step S205: When it is detected that exception information occurs on anuplink channel used for transmitting the uplink signals, determine thata signal conflict exists in the DOCSIS frame.

After the processing device finishes preprocessing the uplink signals,and generates the DOCSIS frame, the processing device may monitor anuplink channel used for transmitting the uplink signals.

If the processing device detects that exception information occurs onthe uplink channel, the processing device determines that a signalconflict exists in the DOCSIS frame.

The exception information includes modulation error ratio degradation,an increase in a packet loss rate or the like, or signal-to-noise ratiodegradation of an uplink channel, or the like, and the signal conflictis a case in which uplink wavelengths of uplink signals sent by atransmit device of the at least one transmit device are the same.

Step S206: When it is detected that a signal conflict exists in theDOCSIS frame, create at least two signal groups according to the uplinksignals.

When the processing device detects that a signal conflict exists in theDOCSIS frame, the processing device searches for CM identifiers of theat least one transmit device that sends the uplink signals, and createsthe at least two signal groups according to the found CM identifiers.

It should be noted that the signal group is preferably a groupingmatrix, the processing device records CM identifiers of all transmitdevices, and the signal groups may be set according to the CMidentifiers.

Optionally, when the processing device detects that a signal conflictexists in the DOCSIS frame, the processing device may adjust, accordingto a quantity of CMs of each transmit device of the at least onetransmit device, an uplink wavelength of an uplink signal sent by eachtransmit device of the at least one transmit device.

Furthermore, when the processing device detects that a signal conflictexists in the DOCSIS frame, the processing device may adjust uplinkwavelengths of the uplink signals sent by the at least one transmitdevice, which can ensure that when the signal conflict occurs, theuplink wavelengths of the uplink signals sent by the at least onetransmit device are properly allocated. For example, there are threetransmit devices an R-ONU 1, an R-ONU 2, and an R-ONU 3. If the R-ONU 1is connected to one CM, the R-ONU2 is connected to 10 CMs, and the R-ONU3 is connected to 30 CMs, and it is assumed that when step S201 and stepS202 are performed, the processing device allocates a first uplinkwavelength to the R-ONU 2 and the R-ONU 3, and allocates a second uplinkwavelength to the R-ONU 1, when the processing device detects that asignal conflict exists between the uplink signals, the processing devicemay adjust again, according to a quantity of CMs of each transmit deviceof the at least one transmit device, the uplink wavelengths of the atleast one transmit device. Because a quantity of CMs of the R-ONU 3 isrelatively large, the first wavelength can be allocated to the R-ONU 3only, and the second wavelength is allocated to the R-ONU 1 and theR-ONU 2, thereby reducing a probability of occurrence of a conflictbetween uplink signals.

Step S207: Acquire, according to the signal conflict, uplink signalsthat have a same uplink wavelength.

The processing device can acquire, according to the signal conflict, theuplink signals that have a same uplink wavelength and cause the signalconflict. Preferably, the processing device acquires CM identifiersindicated by the uplink signals that have a same uplink wavelength.

Step S208: Allocate the uplink signals that have a same uplinkwavelength to different signal groups, and acquire the signal groupsthat have undergone allocation.

The processing device allocates, according to the signal conflict, theCM identifiers indicated by the uplink signals that have a same uplinkwavelength to different signal groups, and acquires the signal groupsthat have undergone allocation.

Step S209: Perform scheduling on the uplink signals according to thesignal groups that have undergone allocation.

The processing device schedules an uplink bandwidth resource accordingto the signal groups that have undergone allocation, and allocates thescheduled uplink bandwidth resource to CMs corresponding to the uplinksignals. The uplink bandwidth resource may include a time domainresource, a frequency domain resource, or the like.

Further, after performing scheduling on the uplink signals, theprocessing device processes the uplink signals according to the signalgroups in order to complete communication with the CMs in an uplinkchannel.

In this embodiment of the present disclosure, uplink signals sent by atleast one transmit device are received, and scheduling is performed onthe uplink signals according to signal groups such that multiple uplinksignals are allowed to be received simultaneously at any time, and thetransmit device uses a wavelength tunable laser or uses a colored laser,which increases tunability of an uplink wavelength of an uplink signalsent by the transmit device, and increases wavelength types of uplinkwavelengths. Therefore, in a case in which a burst mode is used, hybridmultiplexing of wavelength division multiplexing (WDM) and TDM can beimplemented, and when it is detected that a signal conflict exists,uplink wavelengths of the transmit device can be adjusted again, whichensures that the uplink wavelengths of the transmit device are properlyallocated, and avoids a conflict between uplink signals to the greatestextent, thereby better ensuring normal communication on an uplinkchannel.

The following describes the processing device provided in thisembodiment of the present disclosure in detail with reference to FIG. 3to FIG. 7. It should be noted that the processing devices shown in FIG.3 to FIG. 7 are used to perform the methods of the embodiments shown inFIG. 1 and FIG. 2. For ease of description, only parts related to thisembodiment are described. For technical details that are not disclosed,refer to the embodiments shown in FIG. 1 and FIG. 2 of the presentdisclosure.

Refer to FIG. 3, which is a schematic structural diagram of a processingdevice 1 according to an embodiment of the present disclosure. As shownin FIG. 3, the processing device 1 in this embodiment of the presentdisclosure may include a processing module 11, a grouping module 12, anda scheduling module 13.

The processing module 11 is configured to, when uplink signals sent byat least one transmit device are received, preprocess the uplinksignals, to generate a DOCSIS frame, where the DOCSIS frame includes atleast two uplink signals, and each uplink signal of the at least twouplink signals corresponds to one uplink wavelength.

In a specific implementation, when a processing device 1 receives uplinksignals sent by at least one transmit device, the processing module 11may preprocess the uplink signals. A procedure for the preprocessing mayinclude separating the uplink signals according to at least one type ofuplink wavelength, converting each separated uplink signal into a radiofrequency signal, and combining all converted radio frequency signalsinto an electrical domain signal, performing processing, such asamplification, filtering, or analog-to-digital conversion on theelectrical domain signal, and demodulating the processed electricaldomain signal separately according to SC-QAM and OFDMA, to generate aDOCSIS frame, where the DOCSIS frame includes at least two uplinksignals, each uplink signal of the at least two uplink signalscorresponds to one uplink wavelength. It should be noted that uplinkwavelengths corresponding to the uplink signals may be a same uplinkwavelength, or may be different uplink wavelengths. For a specificuplink wavelength, an uplink wavelength of an uplink signal sent by thetransmit device may be preconfigured by the processing device 1.

After the processing module 11 generates the DOCSIS frame, theprocessing device 1 may monitor an uplink channel used for transmittingthe uplink signals, and if the processing device 1 detects thatexception information occurs on the uplink channel, the processingdevice 1 determines that a signal conflict exists in the DOCSIS frame.

The exception information includes modulation error ratio degradation,an increase in a packet loss rate or the like, or signal-to-noise ratiodegradation of an uplink channel, or the like. The signal conflict is acase in which uplink wavelengths of uplink signals sent by a transmitdevice of the at least one transmit device are the same.

It should be noted that the transmit device may be an R-ONU that uses awavelength tunable laser or an R-ONU that uses a colored laser. Thetransmit device may work in a burst mode, or may work in a continuousmode. A burst mode indicates that multiple R-ONUs may share one uplinkwavelength, and a continuous mode indicates that one R-ONU can occupyonly one specific uplink wavelength. In the burst mode, although alength of a CP of an OFDM uplink signal and a length of a preamble of anSC-QAM uplink signal are limited, compared with the continuous mode,using the burst mode can effectively reduce a signal-to-noise ratio ofan uplink channel.

The wavelength tunable laser may include a DFB laser or a DBR laser. Thecolored laser may include a CWDM laser, or a DWDM laser. Costs of usinga CWDM laser are lower than costs of using a DWDM laser, a DFB laser, ora DBR laser, where the DFB laser and the DBR laser are both wavelengthtunable lasers. A wavelength tunable range (where each degree Celsiuscorresponds to a wavelength shift of 0.1 nm) of 3 nm to 4 nm can beachieved by controlling an operating temperature of the DFB laser. TheDBR has a wavelength tunable range of about 10 nm.

The grouping module 12 is configured to, when it is detected that asignal conflict exists in the DOCSIS frame, create at least two signalgroups according to the uplink signals, and allocate, to the at leasttwo signal groups, uplink signals that have a same uplink wavelength andcause the signal conflict.

In a specific implementation, when the processing device 1 detects thata signal conflict exists in the DOCSIS frame, the creating, by thegrouping module 12, signal groups according to the uplink signalsfurther includes searching for CM identifiers of the at least onetransmit device that sends the uplink signals, and creating the at leasttwo signal groups according to the found CM identifiers, allocating, bythe processing device to different signal groups, CM identifiersindicated by uplink signals that have a same uplink wavelength and causethe signal conflict, and acquiring the signal groups that have undergoneallocation.

It should be noted that the signal group is preferably a groupingmatrix, the processing device 1 records CM identifiers of all transmitdevices, and the signal groups may be set according to the CMidentifiers.

Optionally, when the processing device 1 detects that a signal conflictexists between the uplink signals, the processing device 1 may adjustthe uplink wavelengths of the uplink signals sent by the at least onetransmit device, which can ensure that when the signal conflict occurs,the uplink wavelengths of the uplink signals sent by the at least onetransmit device are properly allocated.

The scheduling module 13 is configured to perform scheduling on theuplink signals according to the signal groups that have undergoneallocation.

Further, the scheduling module 13 schedules an uplink bandwidth resourceaccording to the signal groups that have undergone allocation, andallocates the scheduled uplink bandwidth resource to CMs correspondingto the uplink signals. The uplink bandwidth resource may include a timedomain resource, a frequency domain resource, or the like.

Further, after the scheduling module 13 performs the scheduling on theuplink signals, the processing device 1 processes the uplink signalsaccording to the signal groups in order to complete communication withthe CMs in an uplink channel.

In this embodiment of the present disclosure, uplink signals sent by atleast one transmit device are received, and scheduling is performed onthe uplink signals according to signal groups such that multiple uplinksignals are allowed to be received simultaneously at any time, and atransmit device uses a wavelength tunable laser or uses a colored laser,which increases tunability of an uplink wavelength of an uplink signalsent by the transmit device, and avoids a conflict between uplinksignals to the greatest extent, thereby better ensuring normalcommunication on an uplink channel.

Refer to FIG. 4, which is a schematic structural diagram of anotherprocessing device 1 according to an embodiment of the presentdisclosure. As shown in FIG. 4, the processing device 1 in thisembodiment of the present disclosure may include a processing module 11,a grouping module 12, a scheduling module 13, and a configuration module14.

The configuration module 14 is configured to configure an uplinkwavelength for each transmit device of at least one transmit device tosend an uplink signal such that each transmit device of the at least onetransmit device sends an uplink signal using the configured uplinkwavelength.

In a specific implementation, the configuration module 14 configures anuplink wavelength for each transmit device of at least one transmitdevice to send an uplink signal. Preferably, the configuration module 14may send configuration information to at least one transmit device thatsends an uplink signal, where the configuration information may carryinformation about the uplink wavelength for each transmit device of theat least one transmit device to send an uplink signal.

The transmit device may be an R-ONU that uses a wavelength tunable laseror an R-ONU that uses a colored laser. The transmit device may work in aburst mode, or may work in a continuous mode. A burst mode indicatesthat multiple R-ONUs may share one uplink wavelength, and a continuousmode indicates that one R-ONU can occupy only one specific uplinkwavelength. In the burst mode, although a length of a CP of an OFDMuplink signal and a length of a preamble of an SC-QAM uplink signal arelimited, compared with the continuous mode, using the burst mode caneffectively reduce a signal-to-noise ratio of an uplink channel.

The wavelength tunable laser may include a DFB laser or a DBR laser. Thecolored laser may include a CWDM laser, or a DWDM laser. Costs of usinga CWDM laser are lower than costs of using a DWDM laser, a DFB laser, ora DBR laser, where the DFB laser and the DBR laser are both wavelengthtunable lasers. A wavelength tunable range (where each degree Celsiuscorresponds to a wavelength shift of 0.1 nm) of 3 nm to 4 nm can beachieved by controlling an operating temperature of the DFB laser. TheDBR has a wavelength tunable range of about 10 nm.

For example, for a transmit device that includes a wavelength tunablelaser, when the transmit device is powered on, the transmit device workson a preset wavelength, and a parsing module needs to be built in thetransmit device and is configured to parse configuration informationdelivered by the processing device. The processing device may deliverconfiguration information using a downlink channel according to anuplink conflict monitoring status. For example, if a DOCSIS systemincludes only four transmit devices, the configuration module 14 maytune an uplink wavelength of the transmit device to a specific valueusing the configuration information, which can ensure that noconflicting uplink signals exist on an uplink channel of the system. Ifa DOCSIS system includes more than four transmit devices, theconfiguration module 14 needs to tune an uplink wavelength using apreset algorithm and according to an uplink channel status, andconfigure the uplink wavelength of the transmit device using theconfiguration information, thereby ensuring that no conflicting uplinksignals exist on an uplink channel of the system.

The processing module 11 is configured to, when uplink signals sent byat least one transmit device are received, preprocess the uplinksignals, to generate a DOCSIS frame, where the DOCSIS frame includes atleast two uplink signals, and each uplink signal of the at least twouplink signals corresponds to one uplink wavelength.

In a specific implementation, when the processing device 1 receivesuplink signals sent by at least one transmit device, the processingmodule 11 may preprocess the uplink signals. A procedure for thepreprocessing may include separating the uplink signals according to atleast one type of uplink wavelength, converting each separated uplinksignal into a radio frequency signal, and combining all converted radiofrequency signals into an electrical domain signal, performingprocessing, such as amplification, filtering, or analog-to-digitalconversion on the electrical domain signal, and demodulating theprocessed electrical domain signal separately according to SC-QAM andOFDMA, to generate a DOCSIS frame, where the DOCSIS frame includes atleast two uplink signals, each uplink signal of the at least two uplinksignals corresponds to one uplink wavelength. It should be noted thatuplink wavelengths corresponding to the uplink signals may be a sameuplink wavelength, or may be different uplink wavelengths. For aspecific uplink wavelength, an uplink wavelength of an uplink signalsent by the transmit device may be preconfigured by the configurationmodule 14.

Refer to FIG. 5, which is a schematic structural diagram of theprocessing module according to this embodiment of the presentdisclosure. As shown in FIG. 5, the processing module 11 may include aseparation unit 111, a combination unit 112, and a demodulation unit113.

The separation unit 111 is configured to, when the uplink signals sentby the at least one transmit device are received, separate the uplinksignals according to at least one type of uplink wavelength.

In a specific implementation, when the processing device receives atleast one uplink signal sent by a transmit device, the separation unit111 separates the uplink signal according to at least one type of uplinkwavelength, to form multiple uplink signals.

The combination unit 112 is configured to convert each separated uplinksignal into a radio frequency signal, and combine all converted radiofrequency signals into an electrical domain signal.

In a specific implementation, the combination unit 112 converts eachseparated uplink signal into a radio frequency signal, and combines allconverted radio frequency signals into one electrical domain signal.

The demodulation unit 113 is configured to demodulate the electricaldomain signal to obtain the DOCSIS frame.

In a specific implementation, the demodulation unit 113 performsprocessing, such as amplification, filtering, or analog-to-digitalconversion on the electrical domain signal, and demodulates theprocessed electrical domain signal separately according to SC-QAM andOFDMA, to generate the DOCSIS frame.

It should be noted that a procedure for demodulation according to OFDMAincludes performing processing, such as FFT, de-interleaving, or errorcorrection encoding and decoding on the electrical domain signal.

The grouping module 12 is configured to, when it is detected that asignal conflict exists in the DOCSIS frame, create at least two signalgroups according to the uplink signals, and allocate, to the at leasttwo signal groups, uplink signals that have a same uplink wavelength andcause the signal conflict.

In a specific implementation, when the processing device 1 detects thata signal conflict exists in the DOCSIS frame, the creating, by theprocessing device, signal groups according to the uplink signals furtherincludes searching for CM identifiers of the at least one transmitdevice that sends the uplink signals, and creating the at least twosignal groups according to the found CM identifiers, allocating, by thegrouping module 12 to different signal groups, CM identifiers indicatedby uplink signals that have a same uplink wavelength and cause thesignal conflict, and acquiring the signal groups that have undergoneallocation.

It should be noted that the signal group is preferably a groupingmatrix, the processing device records CM identifiers of all transmitdevices, and the signal groups may be set according to the CMidentifiers.

Optionally, when the processing device detects that a signal conflictexists in the DOCSIS frame, the processing device may adjust the uplinkwavelengths of the uplink signals sent by the at least one transmitdevice, which can ensure that when the signal conflict occurs, theuplink wavelengths of the uplink signals sent by the at least onetransmit device are properly allocated.

Refer to FIG. 6, which is a schematic structural diagram of the groupingmodule according to this embodiment of the present disclosure. As shownin FIG. 6, the grouping module 12 may include a determining unit 121, agrouping unit 122, a signal acquiring unit 123, and an allocation andacquiring unit 124.

The determining unit 121 is configured to, when it is detected thatexception information occurs on an uplink channel used for transmittingthe uplink signals, determine that a signal conflict exists in theDOCSIS frame, where the exception information includes modulation errorratio degradation, or an increase in a packet loss rate or the like.

In a specific implementation, after the processing module 11 finishespreprocessing the uplink signals, and generates the DOCSIS frame, theprocessing device 1 may monitor an uplink channel used for transmittingthe uplink signals.

If the processing device detects that exception information occurs onthe uplink channel, the determining unit 121 determines that a signalconflict exists in the DOCSIS frame.

The exception information includes modulation error ratio degradation,an increase in a packet loss rate or the like, or signal-to-noise ratiodegradation of an uplink channel, or the like. The signal conflict is acase in which uplink wavelengths of uplink signals sent by a transmitdevice of the at least one transmit device are the same.

The grouping unit 122 is configured to create at least two signal groupsaccording to the uplink signals.

In a specific implementation, when the determining unit 121 determinesthat a signal conflict exists in the DOCSIS frame, the grouping unit 122searches for CM identifiers of the at least one transmit device thatsends the uplink signals, and creates the at least two signal groupsaccording to the found CM identifiers.

It should be noted that the signal group is preferably a groupingmatrix, the processing device 1 records CM identifiers of all transmitdevices, and the signal groups may be set according to the CMidentifiers.

Optionally, when the determining unit 121 determines that a signalconflict exists in the DOCSIS frame, the processing device may adjust,according to a quantity of CMs of each transmit device of the at leastone transmit device, an uplink wavelength of an uplink signal sent byeach transmit device of the at least one transmit device.

Furthermore, when the determining unit 121 determines that a signalconflict exists in the DOCSIS frame, the processing device 1 may adjustthe uplink wavelengths of the uplink signals sent by the at least onetransmit device, which can ensure that when a signal conflict occurs,the uplink wavelengths of the uplink signals sent by the at least onetransmit device are properly allocated. For example, there are threetransmit devices an R-ONU 1, an R-ONU 2, and an R-ONU 3. If the R-ONU 1is connected to one CM, the R-ONU2 is connected to 10 CMs, and the R-ONU3 is connected to 30 CMs, and it is assumed that when step S201 and stepS202 are performed, the processing device 1 allocates a first uplinkwavelength to the R-ONU 2 and the R-ONU 3, and allocates a second uplinkwavelength to the R-ONU 1, when the processing device detects that asignal conflict exists between the uplink signals, the processing device1 may adjust again, according to a quantity of CMs of each transmitdevice of the at least one transmit device, the uplink wavelengths ofthe at least one transmit device. Because a quantity of CMs of the R-ONU3 is relatively large, the first wavelength can be allocated to theR-ONU 3 only, and the second wavelength is allocated to the R-ONU 1 andthe R-ONU 2, thereby reducing a probability of occurrence of a conflictbetween uplink signals.

The signal acquiring unit 123 is configured to acquire, according to thesignal conflict, the uplink signals that have a same uplink wavelength.

In a specific implementation, the signal acquiring unit 123 may acquire,according to the signal conflict, the uplink signals that have a sameuplink wavelength and cause the signal conflict. Preferably, the signalacquiring unit 123 acquires CM identifiers indicated by the uplinksignals that have a same uplink wavelength.

The allocation and acquiring unit 124 is configured to allocate theuplink signals that have a same uplink wavelength to different signalgroups, and acquire the signal groups that have undergone allocation.

In a specific implementation, the allocation and acquiring unit 124allocates, according to the signal conflict, the CM identifiersindicated by the uplink signals that have a same uplink wavelength todifferent signal groups, and acquires the signal groups that haveundergone allocation.

A scheduling module 13 is configured to perform scheduling on the uplinksignals according to the signal groups that have undergone allocation.

In a specific implementation, the scheduling module 13 schedules anuplink bandwidth resource according to the signal groups that haveundergone allocation, and allocates the scheduled uplink bandwidthresource to CMs corresponding to the uplink signals. The uplinkbandwidth resource may include a time domain resource, a frequencydomain resource, or the like.

Further, after the scheduling module 13 performs the scheduling on theuplink signals, the processing device 1 processes the uplink signalsaccording to the signal groups in order to complete communication withthe CMs in an uplink channel.

In this embodiment of the present disclosure, uplink signals sent by atleast one transmit device are received, and scheduling is performed onthe uplink signals according to signal groups such that multiple uplinksignals are allowed to be received simultaneously at any time, and thetransmit device uses a wavelength tunable laser or uses a colored laser,which increases tunability of an uplink wavelength of an uplink signalsent by the transmit device, and increases wavelength types of uplinkwavelengths. Therefore, in a case in which a burst mode is used, hybridmultiplexing of WDM and TDM can be implemented, and when it is detectedthat a signal conflict exists, uplink wavelengths of the transmit devicecan be adjusted again, which ensures that the uplink wavelengths of thetransmit device are properly allocated, and avoids a conflict betweenuplink signals to the greatest extent, thereby better ensuring normalcommunication on an uplink channel.

Also refer to FIG. 7, which is a schematic structural diagram of stillanother processing device according to an embodiment of the presentdisclosure. As shown in FIG. 7, the processing device in this embodimentof the present disclosure may include a receiver and a processor, wherethe processor performs the following steps: when controlling thereceiver to receive uplink signals sent by at least one transmit device,preprocessing the uplink signals, to generate a DOCSIS frame, where theDOCSIS frame includes at least two uplink signals, and each uplinksignal of the at least two uplink signals corresponds to one uplinkwavelength; when detecting that a signal conflict exists in the DOCSISframe, creating at least two signal groups according to the uplinksignals, and allocating, to the at least two signal groups, uplinksignals that have a same uplink wavelength and cause the signalconflict, and performing scheduling on the uplink signals according tothe signal groups that have undergone allocation.

Before performing the step of receiving uplink signals sent by at leastone transmit device, the processor further performs the following stepof configuring an uplink wavelength for each transmit device of the atleast one transmit device to send an uplink signal such that eachtransmit device of the at least one transmit device sends an uplinksignal using the configured uplink wavelength.

When performing the step of preprocessing the uplink signals, togenerate a DOCSIS frame, the processor further performs the followingsteps: separating the uplink signals according to at least one type ofuplink wavelength, converting each separated uplink signal into a radiofrequency signal, and combining all converted radio frequency signalsinto an electrical domain signal, and demodulating the electrical domainsignal to obtain the DOCSIS frame.

When performing the step of detecting that a signal conflict exists inthe DOCSIS frame, the processor further performs the following step,when detecting that exception information occurs on an uplink channelused for transmitting the uplink signals, determining that a signalconflict exists in the DOCSIS frame, where the exception informationincludes modulation error ratio degradation, or an increase in a packetloss rate or the like.

When performing the step of allocating, to the signal groups, uplinksignals that have a same uplink wavelength and cause the signalconflict, the processor further performs the following steps acquiring,according to the signal conflict, the uplink signals that have a sameuplink wavelength, and allocating the uplink signals that have a sameuplink wavelength to different signal groups, and acquiring the signalgroups that have undergone allocation.

When performing the step of performing scheduling on the uplink signalsaccording to the signal groups that have undergone allocation, theprocessor further performs the following step of scheduling an uplinkbandwidth resource according to the signal groups that have undergoneallocation, and allocating the scheduled uplink bandwidth resource toCMs corresponding to the uplink signals.

In this embodiment of the present disclosure, uplink signals sent by atleast one transmit device are received, and scheduling is performed onthe uplink signals according to signal groups such that multiple uplinksignals are allowed to be received simultaneously at any time, and atransmit device uses a wavelength tunable laser or uses a colored laser,which increases tunability of an uplink wavelength of an uplink signalsent by the transmit device, and avoids a conflict between uplinksignals to the greatest extent, thereby better ensuring normalcommunication on an uplink channel.

An embodiment of the present disclosure further provides an uplinksignal scheduling system, which may include at least one transmit deviceand the processing device according to the embodiment shown in FIG. 3 toFIG. 6, or may include at least one transmit device and the processingdevice according to the embodiment shown in FIG. 7, where the transmitdevice is configured to send uplink signals to the processing devicesuch that the processing device preprocesses the uplink signals, togenerate a DOCSIS frame such that when detecting that a signal conflictexists in the DOCSIS frame, the processing device creates at least twosignal groups according to the uplink signals, and allocates, to the atleast two signal groups, uplink signals that have a same uplinkwavelength and cause the signal conflict, and the processing deviceperforms scheduling on the uplink signals according to the signal groupsthat have undergone allocation, where the transmit device is an R-ONUthat uses a wavelength tunable laser or an R-ONU that uses a coloredlaser.

It should be noted that the transmit device may be an R-ONU that uses awavelength tunable laser or an R-ONU that uses a colored laser. Thetransmit device may work in a burst mode, or may work in a continuousmode. A burst mode indicates that multiple R-ONUs may share one uplinkwavelength, and a continuous mode indicates that one R-ONU can occupyonly one specific uplink wavelength. In the burst mode, although alength of a CP of an OFDM uplink signal and a length of a preamble of anSC-QAM uplink signal are limited, compared with the continuous mode,using the burst mode can effectively reduce a signal-to-noise ratio ofan uplink channel.

The wavelength tunable laser may include a DFB laser or a DBR laser. Thecolored laser may include a CWDM laser, or a DWDM laser. Costs of usinga CWDM laser are lower than costs of using a DWDM laser, a DFB laser, ora DBR laser, where the DFB laser and the DBR laser are both wavelengthtunable lasers. A wavelength tunable range (where each degree Celsiuscorresponds to a wavelength shift of 0.1 nm) of 3 nm to 4 nm can beachieved by controlling an operating temperature of the DFB laser. TheDBR has a wavelength tunable range of about 10 nm.

In this embodiment of the present disclosure, uplink signals sent by atleast one transmit device are received, and scheduling is performed onthe uplink signals according to signal groups such that multiple uplinksignals are allowed to be received simultaneously at any time; and atransmit device uses a wavelength tunable laser or uses a colored laser,which increases tunability of an uplink wavelength of an uplink signalsent by the transmit device, and avoids a conflict between uplinksignals to the greatest extent, thereby better ensuring normalcommunication on an uplink channel.

With descriptions of the foregoing embodiments, a person skilled in theart may clearly understand that the present disclosure may beimplemented by hardware, firmware or a combination thereof. When thepresent disclosure is implemented by software, the foregoing functionsmay be stored in a computer-readable medium or transmitted as one ormore instructions or code in the computer-readable medium. Thecomputer-readable medium includes a computer storage medium and acommunications medium, where the communications medium includes anymedium that enables a computer program to be transmitted from one placeto another. The storage medium may be any available medium accessible toa computer. The following provides an example but does not impose alimitation. The computer-readable medium may include a random-accessmemory (RAM), a read-only memory (ROM), an electrically erasableprogrammable read-only memory (EEPROM), a compact disc read-only memory(CD-ROM), or another optical disc storage or a disk storage medium, oranother magnetic storage device, or any other medium that can carry orstore expected program code in a form of an instruction or a datastructure and can be accessed by a computer. In addition, any connectionmay be appropriately defined as a computer-readable medium. For example,if software is transmitted from a website, a server or another remotesource using a coaxial cable, an optical fiber/cable, a twisted pair, adigital subscriber line (DSL) or wireless technologies such as infraredray, radio and microwave, the coaxial cable, optical fiber/cable,twisted pair, DSL or wireless technologies such as infrared ray, radioand microwave are included in definition of a medium to which theybelong. For example, a disk and disc used by the present disclosureincludes a compact disc (CD), a laser disc, an optical disc, a digitalversatile disc (DVD), a floppy disk and a Blu-ray® disc, where the diskgenerally copies data by a magnetic means, and the disc copies dataoptically by a laser means. The foregoing combination should also beincluded in the protection scope of the computer-readable medium.

What is disclosed above is merely exemplary embodiments of the presentdisclosure, and certainly is not intended to limit the protection scopeof the present disclosure. Therefore, equivalent variations made inaccordance with the claims of the present disclosure shall fall withinthe scope of the present disclosure.

What is claimed is:
 1. An uplink signal scheduling method, comprising:preprocessing uplink signals, to generate a data over cable serviceinterface specification (DOCSIS) frame when the uplink signals sent byat least one transmit device are received, wherein the DOCSIS framecomprises at least two uplink signals, and wherein each uplink signal ofthe at least two uplink signals corresponds to one uplink wavelength;determining that a signal conflict exists in the DOCSIS frame whenexception information occurs on an uplink channel used for transmittingthe uplink signals, wherein the exception information comprisesmodulation error ratio degradation or an increase in a packet loss rate;creating at least two signal groups according to the uplink signals whenit is detected that the signal conflict exists in the DOCSIS frame;acquiring, according to the signal conflict, uplink signals that have asame uplink wavelength; allocating the uplink signals that have the sameuplink wavelength and cause the signal conflict to different signalgroups of the at least two signal groups; acquiring the signal groupsthat have undergone allocation; and performing scheduling on the uplinksignals according to the signal groups that have undergone allocation.2. The method according to claim 1, wherein before receiving uplinksignals sent by the transmit device, the method further comprisesconfiguring an uplink wavelength for each transmit device to send theuplink signal such that each transmit device sends the uplink signalusing the configured uplink wavelength.
 3. The method according to claim1, wherein preprocessing the uplink signals, to generate the DOCSISframe comprises: separating the uplink signals according to at least onetype of uplink wavelength; converting each separated uplink signal intoa radio frequency signal; combining all converted radio frequencysignals into an electrical domain signal; and demodulating theelectrical domain signal to obtain the DOCSIS frame.
 4. The methodaccording to claim 1, wherein performing scheduling on the uplinksignals according to the signal groups that have undergone allocationcomprises: scheduling an uplink bandwidth resource according to thesignal groups that have undergone allocation; and allocating thescheduled uplink bandwidth resource to cable modems (CMs) correspondingto the uplink signals.
 5. A processing device, comprising: a memory; anda processor coupled to the memory, wherein the processor is configuredto: preprocess uplink signals when the uplink signals sent by at leastone transmit device are received; generate a data over cable serviceinterface specification (DOCSIS) frame, wherein the DOCSIS framecomprises at least two uplink signals, and wherein each uplink signal ofthe at least two uplink signals corresponds to one uplink wavelength;determine that a signal conflict exists in the DOCSIS frame whenexception information occurs on an uplink channel used for transmittingthe uplink signals, wherein the exception information comprisesmodulation error ratio degradation or an increase in a packet loss rate;create at least two signal groups according to the uplink signals whenit is detected that the signal conflict exists in the DOCSIS frame;acquire, according to the signal conflict, uplink signals that have asame uplink wavelength; allocate the uplink signals that have the sameuplink wavelength and cause the signal conflict to different signalgroups of the at least two signal groups; acquire the signal groups thathave undergone allocation; and perform scheduling on the uplink signalsaccording to the signal groups that have undergone allocation.
 6. Theprocessing device according to claim 5, wherein the processor is furtherconfigured to configure an uplink wavelength for each transmit device tosend an uplink signal such that each transmit device sends the uplinksignal using the configured uplink wavelength.
 7. The processing deviceaccording to claim 5, wherein the processor is further configured to:separate the uplink signals according to at least one type of uplinkwavelength when the uplink signals sent by the at least one transmitdevice are received; convert each separated uplink signal into a radiofrequency signal; combine all converted radio frequency signals into anelectrical domain signal; and demodulate the electrical domain signal toobtain the DOCSIS frame.
 8. The processing device according to claim 5,wherein the processor is further configured to: schedule an uplinkbandwidth resource according to the signal groups that have undergoneallocation; and allocate the scheduled uplink bandwidth resource tocable modems (CMs) corresponding to the uplink signals.
 9. A processingdevice, comprising: a receiver; and a processor coupled to the receiverand configured to: preprocess uplink signals to generate a data overcable service interface specification (DOCSIS) frame when controllingthe receiver to receive the uplink signals sent by at least one transmitdevice, wherein the DOCSIS frame comprises at least two uplink signals,and wherein each uplink signal corresponds to one uplink wavelength;determine that a signal conflict exists in the DOCSIS frame whenexception information occurs on an uplink channel used for transmittingthe uplink signals, wherein the exception information comprisesmodulation error ratio degradation or an increase in a packet loss rate;create at least two signal groups according to the uplink signals whenthe signal conflict exists in the DOCSIS frame; acquire, according tothe signal conflict, uplink signals that have a same uplink wavelength;allocate the uplink signals that have the same uplink wavelength andcause the signal conflict to different signal groups of the at least twosignal groups; acquire the signal groups that have undergone allocation;and perform scheduling on the uplink signals according to the signalgroups that have undergone allocation.
 10. An uplink signal schedulingsystem, comprising: at least one transmit device configured to senduplink signals and comprising a radio frequency over glass-opticalnetwork unit (R-ONU) that uses a distributed feedback (DFB) laser, adistributed Bragg reflector (DBR) laser, or a colored laser; and aprocessing device configured to receive the uplink signals from the atleast one transmit device and comprising: a receiver; and a processorcoupled to the receiver and configured to: preprocess the uplink signalsto generate a data over cable service interface specification (DOCSIS)frame; determine that a signal conflict exists in the DOCSIS frame whenexception information occurs on an uplink channel used for transmittingthe uplink signals, wherein the exception information comprisesmodulation error ratio degradation or an increase in a packet loss rate;create at least two signal groups according to the uplink signals;acquire, according to the signal conflict, uplink signals that have asame uplink wavelength; allocate the uplink signals that have the sameuplink wavelength and cause the signal conflict to different signalgroups of the at least two signal groups; acquire the signal groups thathave undergone allocation; and perform scheduling on the uplink signalsaccording to the signal groups that have undergone allocation.